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Title:: Performance evaluation of PEC-261 catalyst for hydrogenation of C2 fraction

作者:: 谭都平1; 张峰1; 车春霞1; 杨博1; 李保江2; 张生芳2; 彭远嘱2; （1.中国石油石油化工研究院兰州化工研究中心，甘肃兰州 730060；2.中国石油兰州石化公司石油化工厂，甘肃兰州 730060）

Author(s):: TAN Du-ping1; ZHANG Feng1; CHE Chun-xia1; YANG Bo1; LI Bao-jiang2; ZHANG Sheng-fang2; PENG Yuan-zhu2; （1. Lanzhou Petrochemical Research Center，Petrochemical Research Institute，PetroChina，Lanzhou 730060，China；2. Petrochemical Plant of Lanzhou Petrochemical Company，PetroChina，Lanzhou 730060，China）

Keywords:: C2 hydrogenation; CO; catalyst; ethylene selectivity; acetylene; performance evaluation

摘要:: 对碳二后加氢催化剂PEC-261，根据单段和两段加氢工艺，在乙炔体积分数为0.60%~1.50%，体积空速为3 000 h-1的工况下，于工业侧线评价装置中进行长周期性能评价。结果表明：高体积分数CO物料的碳二加氢，其乙烯选择性最低为70%，明显高于常规单段碳二加氢的选择性（-20%）；采用两段加氢，可达到较长运行周期和较高选择性的双重效果；单段加氢运行期间反应器出口乙炔体积分数低于2×10-6，乙烯总选择性达到90%以上，1 000 h长周期运行期间，反应器入口温度仅提高5 ℃，达到工业装置要求；在原料中有高体积分数CO时，PEC-261催化剂可以满足长周期运行的要求。

Abstract:: Under the condition with the acetylene volume fraction of 0.60%-1.50% and the space velocity of 3 000 h-1， the long-period performance evaluation based on the single-stage and two-stage hydrogenation process on the industrial siding evaluation device was carried out on PEC-261， a tail-end C2 hydrogenation catalyst. The results showed that during the C2 hydrogenation with high CO volume fraction， the lowest selectivity of ethylene was 70%， which was much higher than that of conventional single-stage C2 hydrogenation （-20%）. The long operation period and high selectivity could be achieved by two-stage hydrogenation. During the operation of single-stage C2 hydrogenation， the volume fraction of acetylene at the outlet of the reactor was less than 2×10-6， and the overall selectivity of ethylene was more than 90%. During the 1 000 h long-period operation， the inlet temperature of the reactor increased only 5 ℃，which met the requirements of industrial plant. The PEC-261 catalyst could meet the requirements of long-term operation when there was high CO volume fraction in the feed stock.